Scratch-building an HO scale model of a stone arch viaduct using plaster and a latex rubber mold....

The Summer 2010 quarterly members newsletter of the Gateway Division NMRA, the RPO, is now available online in PDF (Adobe Acrobat) format....

Have you ever looked at someone’s layout and wondered how they did all the rock castings? There are basically two methods, dry and wet. The dry method allows the modeler to mix large batches of plaster at a time. Have several molds ready and pour the plaster into molds until your supp...